Sichuan Chemical has signed an agreement to purchase 500,000 metric tons per year of potash from Prospect Global Resources, which plans to open a potash mine in Holbrook, Ariz., by early 2016. The 10-year deal is valued at $2 billion and represents about 25% of the mine’s expected output.

Sensient Technologies will build a colors and flavors R&D and manufacturing complex in Johannesburg, South Africa. The Milwaukee-based firm says the facility will provide African customers with local service.

Dr. Reddy’s Laboratories will acquire all shares of Amsterdam-based OctoPlus for $36 million. Through the acquisition, the Indian drug firm will gain drug formulation capabilities and a research base in the Netherlands.

Wellcome Trust has awarded the British drug discovery firm Summit $6.5 million, to be allotted in success-based payments, toward the clinical development of the antibiotic SMT 19969. The first payment will support a Phase I study of the small molecule, which combats Clostridium difficile infections.

Abbott will pay $25 million for rights to use Seattle Genetics’ auristatin-based antibody-drug conjugate technology with additional oncology targets. Last year, Abbott paid $8 million for the rights to use it with a single oncology target.